Bug 16492 - bitbake: write_variables fails on missing build folder
Summary: bitbake: write_variables fails on missing build folder
Status: NEW
Alias: None
Product: BitBake
Classification: Build System, Metadata & Runtime
Component: bitbake (show other bugs)
Version: unspecified
Hardware: x86 Multiple
: Undecided normal
Target Milestone: 0.0.0
Assignee: Richard Purdie
QA Contact:
URL:
Whiteboard:
Depends on:
Blocks:
 
Reported: 2026-11-10 13:33 UTC by Mathieu Dubois-Briand
Modified: 2026-11-10 13:33 UTC (History)
2 users (show)

See Also:
OS type for building Yocto: ---
Type of Regression: ---
Verified:
Documentation change: No (bug/feature does not impact docs)

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Mathieu Dubois-Briand 2026-11-10 13:33:33 UTC 
I had a bitbake crash after removing the tmp folder while bitbake-resident was still alive:


> ERROR: Command execution failed: Traceback (most recent call last):
>   File "/home/mathieu/projects/swat/gits/bitbake/lib/bb/command.py", line 127, in runAsyncCommand
>     commandmethod(self.cmds_async, self, options)
>     ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>   File "/home/mathieu/projects/swat/gits/bitbake/lib/bb/command.py", line 644, in buildTargets
>     command.cooker.buildTargets(pkgs_to_build, task)
>     ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
>   File "/home/mathieu/projects/swat/gits/bitbake/lib/bb/cooker.py", line 1588, in buildTargets
>     self.eventlog[2].write_variables()
>     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
>   File "/home/mathieu/projects/swat/gits/bitbake/lib/bb/cooker.py", line 116, in write_variables
>     with open(self.eventfile, "a") as f:
>          ~~~~^^^^^^^^^^^^^^^^^^^^^
> FileNotFoundError: [Errno 2] No such file or directory: '/home/mathieu/projects/swat/gits/build/tmp/log/eventlog/20261109164837.json'

This can easily be reproduced with:

> export BB_SERVER_TIMEOUT=600
> bitbake zlib-native
> rm -rf tmp/log/eventlog
> bitbake zlib-native

Now, I feel we are missing an mkdir() somewhere, maybe just in write_variables(). But maybe one should not manipulate the tmp folder while bitbake is still alive.